In a statement released by the White House, Pence said Sunday's story in The New York Times "is disgraceful and offensive to me, my family, and our entire team." He added that "the allegations in this article are categorically false."

Pence continued, saying his team will "focus all our efforts to advance the president's agenda and see him re-elected in 2020."

The report details efforts of several Republicans looking ahead to 2020, calling it a "shadow campaign." It notes Pence's political schedule and active fundraising, though it also says unnamed advisers have signaled that he'd only run if Trump doesn't.

Trump has not suggested he won't seek a second term. But his first six months in office have been turbulent, marked by staff infighting, legislative struggles and a series of investigations.

White House counselor Kellyanne Conway also dismissed the report and said Pence is readying to run in 2020 alongside Trump.

"Vice President Pence is a very loyal, very dutiful, but also incredibly effective vice president, and active vice president, with this president," said Conway on ABC's "This Week." ''He is a peer to the president in the West Wing."

New York Times spokeswoman Danielle Rhoades Ha said in an emailed statement: "We are confident in the accuracy of our reporting and will let the story speak for itself."